html, body {
  background-color: aqua;
}

html .box, body .box {
  width: 220px;
  height: 120px;
  background: url("../images/tupian.jpg");
  background-size: cover;
}

html .box2, body .box2 {
  width: 220px;
  height: 120px;
  background: url("../images2/tupian.jpg");
  background-size: cover;
}
